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Referencing technique for intensity-based sensors using fibre optic Bragg gratings

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3 Author(s)
Cavaleiro, P.M. ; Grupo de Optoelectronica, INESC, Porto, Portugal ; Ribeiro, A.B.L. ; Santos, J.L.

An all-optical fibre referencing scheme for intensity based sensors which uses two identical fibre Bragg gratings is described. It provides a general and simple miniature sensor design with referencing directiveness against system power fluctuations. The concept is demonstrated for a reflective-type displacement sensing cavity, and its potential for simultaneous measurand and temperature evaluation is evaluated

Published in:

Electronics Letters  (Volume:31 ,  Issue: 5 )